Visible light control by GaN photonic band gaps

We propose a new structure to control the emission and the propagation of v isible light: the graphite arrangement of parallel circular dielectric rods in air. Using the Plane Wave Method and the Transfer Matrix Method, we sho w that, for high air filling factors, the graphite photonic hand gap is sti ll wide even for low dielectric constants of the semiconductor (epsilon = 8 ). The dimensions of the graphite PC are large and should easily be etched in wide gap semiconductors.